package csu.webcourse.mypetstore.persistence.impl;

import csu.webcourse.mypetstore.domain.LineItem;
import csu.webcourse.mypetstore.persistence.DBUtil;
import csu.webcourse.mypetstore.persistence.LineItemDao;

import java.lang.ref.SoftReference;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

public class LineItemDaoImpl implements LineItemDao {
    private static final String GET_LINE_ITEMS_BY_ORDERID = "SELECT" +
            " ORDERID," +
            "LINENUM AS lineNumber," +
            "ITEMID," +
            "QUANTITY," +
            "UNITPRICE" +
            " FROM LINEITEM" +
            " WHERE ORDERID = ?";

    private static final String INSERT_LINE_ITEM = "INSERT INTO LINEITEM (ORDERID, LINENUM, ITEMID, QUANTITY, UNITPRICE)" +
            "VALUES (?, ?, ?, ?, ?)";

    @Override
    public List<LineItem> getLineItemsByOrderId(int orderId) {
        List<LineItem> lineItems = null;
        try {
            lineItems = new ArrayList<>();
            Connection connection = DBUtil.getConnection();
            PreparedStatement preparedStatement = connection.prepareStatement(GET_LINE_ITEMS_BY_ORDERID);
            preparedStatement.setInt(1, orderId);
            ResultSet resultSet = preparedStatement.executeQuery();
            while (resultSet.next()) {
                LineItem lineItem = new LineItem();
                lineItem.setOrderId(resultSet.getInt(1));
                lineItem.setLineNumber(resultSet.getInt(2));
                lineItem.setItemId(resultSet.getString(3));
                lineItem.setQuantity(resultSet.getInt(4));
                lineItem.setUnitPrice(resultSet.getBigDecimal(5));
                lineItems.add(lineItem);
            }
            DBUtil.closeResultSet(resultSet);
            DBUtil.closePreparedStatement(preparedStatement);
            DBUtil.closeConnection(connection);
        }catch (Exception e) {
            e.printStackTrace();
        }
        return lineItems;
    }

    @Override
    public void insertLineItem(LineItem lineItem) {
        try {
            Connection connection = DBUtil.getConnection();
            PreparedStatement preparedStatement = connection.prepareStatement(INSERT_LINE_ITEM);
            preparedStatement.setInt(1, lineItem.getOrderId());
            preparedStatement.setInt(2, lineItem.getLineNumber());
            preparedStatement.setString(3, lineItem.getItemId());
            preparedStatement.setInt(4, lineItem.getQuantity());
            preparedStatement.setBigDecimal(5, lineItem.getUnitPrice());
            preparedStatement.executeUpdate();
            DBUtil.closePreparedStatement(preparedStatement);
            DBUtil.closeConnection(connection);
        }catch (Exception e) {
            e.printStackTrace();
        }

    }
}
